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Old 16-06-2009, 09:28 PM
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Bassnut (Fred)
Narrowfield rules!

Bassnut is offline
Join Date: Nov 2006
Location: Sydney
Posts: 4,774
Well, QE on a DSLR is typically 15%, a CCD at least 35% (for a big chip) and over 50% (up to 80% peak) for a smaller one. well depth for a 40D is 25K (I think), a CCD is often 100K, noise is always much lower in a cooled CCD. Dynamic range on a 350D is 12 bit (14bit on a 40D), astro CCDs are 16 bit.

A single shot colour CCD is better than a DSLR, given the cooling and 16bit A/D convertor.
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